Investment Factory design. Verification. Process planning Maintenance. Validation

Transcription

1 Machine tool data management problem Today development of manufacturing systems involves: Duplication of data in different application systems Interpretation of ambiguous and inconsistent data Difficulties to share and communicate data Time-consuming data collection and data re-creation Deficient verification and validation Expensive data archiving Document centered Investment Factory design Verification Process planning Maintenance Validation 1

2 Model based data management Digital i factory key components: Coherent, consistent and consolidated data Concepts, semantics Contexts, views, domains Software and hardware independent data Support for cross application work Investment Factory design Process planning Maintenance Tool magazine: size: 12 tools max tool Ø: 90 mm Environment: max noise: 85 db(a) max vibrations: 0,3 m/s 2 max radiation: 0,5 µt Column: Color: RAL 2002 Spindle: max rpm: interface: HSK-A Verification Validation 2

3 Modeling method requirement Stable and standardized data model also capable of representing future machine tool designs. Extendable model of machine tool concepts Tool magazine: size: 12 tools max tool Ø: 90 mm Column: Color: RAL 2002 Product generic data model Defined machine tool concepts applied on a product generic data model. Environment: max noise: 85 db(a) Spindle: max vibrations: 0,3 m/s 2 max rpm: max radiation: 0,5 µt interface: HSK-A 3

4 Reference to used concepts Data model with interface to externally defined concepts. (e.g. PLCS and ISO 13399) Modeling method where externally defined d concept also can be used at all entity attributes 4

5 Support for xap (cross Application i Protocol) work Machine toolconcepts User View AP 214 Application Protocols map the user view into the STEP data models dl STEP [Figure upper part complemented, original by Howard Mason, Chairman, ISO TC184 SC4.] 5

6 Mapping table between concepts and application protocols Concepts AP214 AP239 Machine_elementelement Item, Part, (Spindle) Alt1: Specific_item_classification.classification_name = 'Spindle' Alt2: General_classification, External_library_reference.id = Classification_assignment, External_class.name = 'Spindle' 'Spindle' Kinematics (Travel_range) Dimension_property (Length) Simple_pair_range, General_property.property_type = 'Travel_range' Alt1: Length_size_dimension Alt2: General_property.property_type = 'Length' Assigned_property, Classification_assignment, External_class.name = 'Travel_range' range' Assigned_property, Classification_assignment, External_class.name = 'Length' 6

7 Implementation to AIM conformance 7

8 Basis of case study STEP, system neutral information models ISO , generic standard for mechanical products (so far the only Application Protocol including kinematic representation) Machine tool is one type of product Machine tool information Functional Requirement Behaviour (thermal, damping etc.) 8

9 STEP AP214 property building blocks Property determination Value Unit calculated designed estimated measured required number string value list value limit maximum minimum SI units derived units conversion units Properties relation decomposition dependency hierarchy peer substitution Value relation decomposition dependency equivalence substitution Identifier name id version Combined it can represent e.g.: Designed maximum spindle motor torque value in Nm unit is dependent on the spindle speed. 9

10 STEP AP214 product lifecycle l [Fig. source: A. von Euler-Chelpin, KTH, PhD thesis] 10

11 Machine tool data model in STEP AP214 Used functionality: Machine tool element classification i (derived d from the ontology) Terminology Element relations e.g. table is a type of mechanical machine element Kinematics, e.g. Joint placement and type Axis direction Travel range Properties, e.g. Spindle speed, max. [rpm] Feed rate, max. [mm/min] Acceleration, max. [mm/min 2 ] Jerk, max. [mm/min 3 ] Interfaces, e.g. Cutting tool placement and type Fixture placement and type 11